Preparation methods of hot melt pressure-sensitive adhesive and protective film as well as hot melt pressure-sensitive adhesive

Abstract

The invention discloses preparation methods of a hot melt pressure-sensitive adhesive and a protective film as well as the hot melt pressure-sensitive adhesive. The preparation method of the hot melt pressure-sensitive adhesive comprises the following steps: adding thermoplastic elastomers, a tackifier, a plasticizer, an antiager, an antioxidant, a crosslinker, a filler and the like into a double-mixed column mixer, stirring, heating until the materials are melted down, and uniformly mixing to obtain the pressure-sensitive adhesive. The preparation method of the protective film comprises the following steps: directly pumping the melted and uniformly mixed pressure-sensitive adhesive into a coating roll of the a hot melt coating machine by a heat transfer pump, coating the pressure-sensitive adhesive onto one face of a polyolefin plastic film or thin plastic-coated paper, cooling, and rolling to obtain the protective film (paper). The hot melt pressure-sensitive adhesive disclosed by the invention can obtain good initial stickiness, cohesion and age stripping property by changing the different ratio of the thermoplastic elastomer as well as the variety and usage amount of the tackifier. The prepared polyethylene (PE) film substrate protective film has low interfacial tension, good initial stickiness, high cohesion and high temperature resistance, light resistance and weather resistance, and the comprehensive performance and product cost of the hot melt pressure-sensitive adhesive disclosed by the invention are better than those of the traditional solvent pressure-sensitive adhesive taking natural rubber as the main material.

Description

technical field [0001] The invention relates to a formulation of a hot-melt pressure-sensitive adhesive, a preparation method and a preparation method of a thermoplastic elastomer PE protective film made from it. Background technique [0002] Protective film or protective tape is composed of pressure-sensitive adhesive and plastic film, so named because of its protective function on other materials. The key material that makes up the protective film is the pressure-sensitive adhesive, and the main materials that make up the pressure-sensitive adhesive are rubber and acrylic resin. In terms of production methods, there are four types: solvent type, water emulsion type, hot melt type and radiation curing type. Pressure-sensitive adhesives based on rubber, especially natural rubber, account for a small proportion, and are replaced by acrylic resins. The main reason is determined by the comprehensive performance and cost of materials. In terms of manufacturing methods, the ac...

AI Technical Summary

Problems solved by technology

[0004] At present, the few existing rubber-type protective films in China have the disadvantages that one is still solvent-based, and the other is that natural rubber is still the main material. Therefore, there are still residual glue after aging, which is difficult to peel off and pollutes the protected material. Disadvantages such as releasing toxic and harmful exhaust gas and low production efficiency

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